I picked up 5 gallon jugs of non-dye K2 at Home Depot for 10 bucks/piece last spring but haven't used much of it because it kinda stinks and was definitely causing excessive nailing in my 350. I've still got 10-15 gallons (it was so cheap I picked up several) so might just blend it in over several tanks.

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1982 300TD 210K miles ("The Replacement" aka "The Anvil") - SOLD
1979 300SD 245K miles (never ending project)
2007 Pinarello F3:13
1995 Ducati 916 (SOLD, sniff)
1999 Ducati 900SSie (SOLD)